Zyrtec (cetirizine) side effects include headaches, dry mouth, and dizziness. Serious side effects are also possible. Learn more about potential side effects, dosing, and when to avoid this over-the-counter antihistamine. Find patient medical information for Cetirizine (Zyrtec) on WebMD including its uses, side effects and safety, interactions, pictures, warnings, and user ratings Zyrtec (Cetirizine) may treat, side effects, dosage, drug interactions, warnings, patient labeling, reviews, and related medications including drug comparison and health resources. Cetirizine is a second-generation peripherally selective antihistamine used to treat allergic rhinitis (hay fever), dermatitis, urticaria (hives), and runny nose. [11] It is taken by mouth. [12] Effects generally begin within thirty minutes and last for about a day. [12] The degree of benefit is similar to other antihistamines such as diphenhydramine, which is a first-generation antihistamine. Zyrtec (cetirizine) treats seasonal and year-round allergy symptoms—sneezing, runny nose, itchy eyes, and hives. Many people feel relief within an hour. Once-daily dosing covers about 24 hours for most adults. Less than Benadryl, but cetirizine still sedates some people—test on a workday before assuming you are immune. Zyrtec Allergy Relief Medicine Tablets relieve your worst indoor and outdoor allergy symptoms, including those from seasonal allergies, pet allergies, and more. 10 milligrams of cetirizine hydrochloride per antihistamine tablet, this prescription-strength allergy relief medicine provides 24 hours of relief from common symptoms of hay fever and. Zyrtec (cetirizine) is used to treat allergy symptoms such as sneezing, itching, watery eyes, or runny nose. Includes Zyrtec side effects, interactions and indications. Find powerful 24-hour relief from allergies & indoor & outdoor symptoms with the help of ZYRTEC® products. Explore here to find allergy tips, info & products. Zyrtec (cetirizine) for allergic rhinitis and hives: 10 mg adult dosing, pediatric dose ranges, drowsiness notes, interactions, and country prices. Browse ZYRTEC® allergy products for adults and children to learn about proper dosing information and how they may help to relieve your patients’ allergy symptoms.